ES2258607T3 - SELECTIVE BLOCK DEVICE FOR DRAWERS WITH ANTIVUELCO EFFECT. - Google Patents

Abstract

The present invention refers to a device for selective blocking of drawers with overturning protection from among the blocking systems that allow the opening of a drawer and at the same time make it impossible to open the remainder of the drawers and therefore reduce the possibility of the cabinet of drawers overturning. The blocking assembly makes use of a small housing (3) internal and integrated in the guide (2) fixed to the drawer, that includes two vertically sliding stops (4, 5) plus a swivel (6) in the shape of a "C" prepared to receive the nipple (2.1) joined to the profile of the guide (2) of the drawer. A special design of the stops (4, 5) and of the swivel (6) allow the selective blocking of the drawers that there are above and below the open drawer. <IMAGE>

Description

Selective drawer locking device With anti-roll effect.

Object of the invention

The present invention relates to a device to selectively lock drawers with protection in front of the dump, among the blocking systems that allow opening a drawer and, at the same time, prevent the opening of the rest of the drawers and, therefore, reduce the possibility of dump of the Chests of drawers

The present invention is characterized by the use of a small accommodation within the guide that includes the main device, based on two stops and a turntable, and which performs selective blocking.

It is characterized by the reduced number of elements that constitute the small accommodation, as well as by the simplicity of assembly, which allows the incorporation of the small accommodation within the guide.

Background of the invention

One of the most important problems in the Chest of drawers design is stability.

The drawers can be fixed or mobile, movable by wheels.

In both cases, the support base is more small or, at most, the same size as the vertical projection of the chest of drawers since, otherwise, the use of a base project beyond the drawer can lead to accidents when pass with her, as well as to inconveniences or impediments in her integration with the rest of the furniture.

The contents of the drawer, and the drawer itself said, it exerts a downward force that can be considered applied in the center of gravity of the assembly.

The opening of the drawer implies a displacement horizontal center of gravity, which is located outside the vertical projection of its base.

This force, in this situation, determines a moment that the drawer tends to overturn, unless the weight of the other drawers are enough to make up for the moment that It favors the dump.

In most cases, the rest of the drawers it is enough to prevent the dump, but if the number of drawers open is large, the probability of the dump happening is, also great.

This effect occurs more frequently with use. of file drawers, since the weight they support is greater habitually.

This problem has been previously addressed. through mechanisms that allow the opening of a single drawer and They block the opening of the rest.

The known mechanisms make use of various devices that prevent opening, for example, by means of pincer systems with actuators external to the guide and which have to be installed as an additional element to the guiding mechanism of the drawer.

These types of locking systems incorporate a high number of pieces, which have to be calibrated properly before installation in the drawers since, if this adjustment is not made, the resulting mechanism present serious difficulties during normal operation.

In addition, these mechanisms are, for the most part part, based on pliers that, while properly admitting pivots in which they act, do not ensure the blocking effect and, by Therefore, opening a drawer only.

The present invention makes use of a mechanism which is clearly simpler than those known in the state of the technique, which results in a device incorporated in the guide and not externally, which reduces installation time, adjustments necessary for your operation, and provides performance guaranteed.

It is known in the state of the art a device for selective locking of drawers with protection against the dump as disclosed in the US patent 4936640, where the system disclosed is based on a cam, which is capable of performing a rotational or translational movement.

Thus, the spirit of the present invention is overcome the above mentioned inconveniences by development of a new device for selective blocking of drawers, designed in such a way that avoids the overturning of the drawers by allowing the opening of only one drawer at a time. To obtain such objectives the device disclosed in the present invention

Description of the invention

The present invention relates to a selective locking device for drawers with front protection to the dump, incorporated in the guides of each of the drawers.

This device consists of the combined use of a locking mechanism that is incorporated in the guide, and of bars connection between these locking systems.

The built-in mechanism is already included in the device at the time of installation, such that only additional incorporation of the bars located between the devices for mutual operation, coordinating the opening from one drawer at a time.

These bars connect with the assemblies of blocking through the existence of some cuts, one superior and another inferior, in the profile they make accessible.

The locking device consists of a small housing formed by two lateral guides that are mounted transversely to the guide attached to the chest of drawers, and connected by two irregular bars at its ends, whose outer face has the same profile as the drawer guides, which allows to secure and Adjust the small housing.

Optionally, this small accommodation can use additional coupling means, or some pivots backs that go into recesses of the drawer guide or, taking advantage of the existence of the upper and lower cuts existing in the guide to allow the passage of the bars of connection between devices, the coupling is secured by projections that rest on the walls of the cut.

In the final position, the guides of the small accommodation are vertical and allow the sliding of the two main pieces that are housed inside.

These two pieces are those that, from here on forward, they are called upper and lower stops, according always with the orientation and position they adopt after the mounting.

The two stops have an irregular shape but both are configured as a base plate with edges coinciding with the guides of the small accommodation in which place and slide, and at opposite ends have a support to secure the bar that serves as a pusher to block the devices that are either above or below, depending on whether It is the top or bottom piece, respectively.

The bar that is fixed on the top stop, is joins the bottom stop of the device found in the guide that corresponds to the drawer located immediately above; and the bar which is fixed on the lower stop, joins the upper stop of the device in the guide that corresponds to the drawer located immediately below.

The drawer has its guide that allows you to enter and get out.

The end of this guide has a pivot centered, oriented towards the fixed guide to the chest of drawers (the largest one), so that, when it enters completely, it has to be placed in the device
blocking.

Securing this pivot is what avoids the opening of the drawer when there is another open and, likewise, this pivot is the one that activates the blocking of all other drawers when He pulls his drawer out.

The pivot, being centered, can only stay between the top and bottom bumper when the drawer is closed.

The contact line between the upper stop and the lower matches the lower horizontal tangent of the pivot.

For this reason, so that the pivot can be placed, the upper stop must rise, to establish a separation distance wide enough for the mentioned pivot between completely.

This vertical displacement of the upper stop raise the bar to which it is attached so that all stops upper and lower, which are placed in the devices of lock installed above, be lifted.

With this elevation, the pivots of the drawers that are above and locked are held inside a plate swivel that has its C-shaped front part, for the purpose of coupling with the pivot.

The horizontal displacement of the pivot, due at the entrance of the drawer, force the rotation of the turntable with the C-shaped front in the direction.

The innermost wing of the "C" front of the turntable extends to the plane of the base of the stops upper and lower and, during rotation in the opposite direction to clockwise, this rear extension stays inside of an arched recess, of fundamentally oblique sides with some occasionally straight sector.

Mechanical interference of the pivot with the stop bottom prevents it from escaping, so that all drawers located above remain locked.

The C-shaped turntable is capable of hold the pivot and, at its rear, has a thickening you can, well stay in the arched recess of it lower stop, or act as a support for the upper stop, merely by rotation through the pivot action and its vertical placement.

The extraction of the drawer blocks, therefore, the withdrawal of both the drawers that are above, and those They are below.

The pivot escape is only possible by the rotation of the C-shaped turntable in the direction of the clockwise, so that the rear extension rests at the top stop.

This support prevents the approach between stops and defines a separation and, in particular, the bottom stop cannot rise

That the bottom stop cannot be raised means that none of the upper stops that are below neither can the withdrawal of the drawers be lifted either Lower is equally locked.

For the "C" shaped turntable rotate in the counterclockwise direction is sufficient enter the drawer that is open, so that it eliminates the support of the rear extension that is housed in the recess in the form of an arc, and in this way the approach between stops.

So, any drawer can be opened and become, in this way, the one that blocks the rest.

The upper stop, in the frontal area or in the outside, it has a ratchet that interferes with the entrance of the pivot, to offer an oblique surface for both the entrance As for the exit.

This oblique surface is what makes it slide to the pivot, forcing the elevation of the upper stopper both to the Entry as at exit.

On the other hand, the bottom stop also has a small rounded that eliminates the edge that would be in place in the entrance area of this same pivot, to allow a Drawer introduction as smooth as possible.

Finally, it remains to establish some means to recover the position of the stops.

For this purpose, there is a rear recess at the top stop, which contains a spring.

The spring works all the time in compression, and the recessed walls prevent it from warping.

The lower end of the pier rests on the lower base of the recess that holds it, and its upper end is fits into a hole made in the top of small accommodation, on the crossbar that serves to secure the Small accommodation to the profile of the guide where you are installed.

The compressive effort of the spring forces the top stop down at all times and, when in contact with the lower bumper, it also pushes him.

The device thus conceived is not only contained within the large guide attached to the chest of drawers, but nor does it increase the width between the profiles that constitute the Fixed and sliding part of the drawer guide.

Description of the drawings

This descriptive specification is complete with a set of drawings illustrating an embodiment preferred and exemplary of the invention, in any way restrictive

Figure 1 is the small housing that contains the upper and lower stops, shown in elevation, plant and profile.

Figure 2 represents, separately, the stop lower elevation and floor, and the turntable with its housing C-shaped, elevation, plan and profile.

Figure 3 represents the top stop in elevation and plant.

Figure 4 is an elevation and assembly profile formed by the drawer guide and its locking device incorporated, in the position resulting from having the drawer open.

Figure 5 is an elevation and assembly profile formed by the drawer guide and its activated locking device, when it comes to a drawer that is above an open one.

Figure 6 is an elevation and assembly profile with the locking device activated, when it comes to a drawer which is below an open one.

Figure 7 is an elevation and profile of three mounts corresponding to three consecutive drawers, with the drawer open intermediate and those located above and below blocked

Preferred Embodiment of the Invention

In the light of the preceding explanation, the The present invention relates to a selective locking device. for drawers with protection against dump.

The drawers can be removed thanks to two side guides, one on each side, with three profiles, one profile width (1), fixed to the chest of drawers, another of smaller dimensions (2), attached to the drawer, plus an intermediate profile that allows extension total and that is not numbered, since it does not intervene in the system of blocking.

The smaller profile (2) or narrow profile (2) can slide with respect to the wide profile (1), to allow linear movement of drawer extraction.

The minor profile (2) has near its innermost termination a pivot (2.1) on its face opposite the wide profile (1), which serves as a means of retention and as an actuator so that the blocking devices work properly.

The end of the wide guide profile (1) it contains a small accommodation (3) that is constituted mainly by two vertical lateral guides (3.1), connected by two irregular horizontal bars (3.2), whose external profile adapts to the shape of the inner face of the wide guide profile (1) for coupling.

Optionally, there may also be other ways to increase the coupling of the small housing (3) to the profile (1) of the guide, either by means of rear pivots (3.3), or by means of projections on the crossbars irregular (3.2), projected to stay in the courts of the profile (1) that allow the connection bars (7) to pass between Locking devices

In the guides (3.1) of the small accommodation (3) two stops are placed, one lower (5) and one upper (4).

The guides (3.1) are the ones that provide the stops upper (4) and lower (5) of the ability to slide vertically

The small accommodation (3) includes, in its bar upper transverse (3.2), a downward directed hole that it houses the upper end of a pier that is housed inside a recess (4.3) that prevents it from warping.

The compressive effort of the spring forces to the top upper (4) down and, when said stop (4) contacts the bottom stop (5), this one is pushed down equally.

The lower stop (5) includes, in turn, a turntable (6), with its C-shaped front part, projected to support the pivot (2.1) of the narrow profile (2).

In turn, the upper wing (6.1) of the "C" of this same turntable extends to the rear face, of such that it ends up resting on the base plate of the stop upper (4), after turning in the direction of the needles of the watch.

When the rotation of the wing (6.1) is performed in the counterclockwise direction, the rear projection it is housed in a recess (5.1) of the stop (5), which supports the plate swivel (6).

Both upper (5) and lower (4) stops are fit tightly against the back face, so that no would come into contact with the pivot (2.1) of the narrow profile (2) if it wasn't for the presence of two frontal projections in those stops (4, 5).

The frontal projection (4.2) of the upper stop (4) has a lower arc-shaped profile such that the entrance of the pivot (2.1), both from the right and from the left, force a vertical displacement of the upper stop (4).

Both stops have a connection to a bar (7) that connects adjacent devices.

Each bottom stop (5) has a connection (5.2) down that joins, through a bar (7), with the connection upper (4.1) of the upper stop (4), which is in the device immediately lower.

On the other hand, the bottom stop (5) also It has a frontal projection (5.3), which comes into contact with the pivot (2.1); on the left side of this frontal projection (5.3) is where the perforation (5.4) is located, in which the plate swivel (6) is housed and pivoted.

Although figures 1, 2 and 3 show the pieces of the locking device separately, Figure 4 shows assembled all the pieces described.

In this last figure and in the following ones, the narrow profile (2) does not hide the elements behind it, in order to allow observing the different positions of the pieces involved in the blockage.

Figure 4 corresponds to the position of the locking system when the drawer is opened.

At the pivot outlet (2.1), the plate swivel is pushed and forced to rotate in the direction of the clockwise, until the wing (6.1), which has an extension Rear is vertical.

During the pivot exit (2.1), the Thickening (4.2) of the upper stop (4) forces its elevation.

The upper stop (4) does not descend, since the extension of the wing (6.1) of the turntable (6), which has been forced to remain vertical, retains it, maintaining the separation with the bottom stop (5).

On the one hand, the bottom stop (5) cannot ascend, given the mandatory distance between stops near the maximum movement than the length of the small housing (3) allows, and the upper stop (4) cannot descend either by the same reason

It will be enough to wait at the entrance of the drawer so that the pivot (2.1) forces the rotation of the turntable counterclockwise, remove the bracket of the wing (6.1) of the turntable (6), and said wing (6.1), with its rear extension, stay in the recess (5.1) projected with this end.

Figure 5 shows the device that corresponds to the locking device with the drawer closed, and the drawer located above open.

In this case, the pivot (2.1) of the profile narrow (2) is behind the projection (4.2) with the curved bottom profile.

If you try to open the drawer, the pivot would rise against this projection (4.2) of the upper stop, tending to raise it; however, this is not possible, since the bar (7) that Connects with the upper device prevents its rise.

At the moment that both upper stops (4) e bottom (5) of the device, shown in Figure 5, and all those who are below are in contact, none of them could raise its upper stop (4) and, therefore, all drawers would be locked in regards to its extraction.

As soon as the top drawer closes, the bottom stop (5) of this upper drawer locking device ceases to be separated from its upper stop (4) and, therefore, the necessary joint ascent movement is allowed again and, with it, the opening of the lower drawers.

Figure 6 shows how the lock is set in the drawers that are located above the open drawer.

In this case, the elevation of both stops (4, 5), forced by the rise of the lower stop (5), produces a alignment between the pivot (2.1) and the turntable (6) in its support (5.4) by a frontal projection.

When both are faced, it is not possible to remove any of the drawers that are above of the open drawer.

As soon as the open drawer is closed, all stops that are above descend, which makes possible Open any of the drawers.

Figure 7 shows the three assemblies together represented in figures 5, 6 and 7, to establish a better relationship between the relative displacements of each of the stops when the middle drawer opens, playing all three cases that have been commented separately and based on more figures detailed.

As far as the outermost drawers are concerned, since it is not necessary to block any below the lower one, or above the higher one, it is enough not to install the connection bar (7).

It is also very simple to incorporate a key of security to block all the drawers.

With avoiding the lifting of the upper stop of the uppermost drawer is enough for any of the Locking devices allow the removal of your drawer respective.

With this objective, a key is included that place an interference element on the last stop, in order to Keep it closed.

Variations in materials, shape, size and arrangement of component elements do not alter nature essential of this invention, described in a non-restrictive manner, the foregoing being sufficient for an expert in the field reproduce.

Claims (10)

1. Device for selective blocking of drawers with dump protection, of the type that allows open a drawer and lock the remaining ones in the same drawer after the opening, to reduce the possibility of dump, which comprises two guides for each drawer and a locking assembly for each guide of the drawer, each guide comprises a narrow profile (2), fixed to the drawer, that slides in a wide profile (1), fixed to the chest of drawers, in which Each of these lock mounts comprises:

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  two stops (4, 5), one upper (4) and one lower (5)

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  a turntable (6), which pivots in a hole (5.4) of the projection (5.3) of the bottom stop (5), with the front part of this "C" shaped turntable designed to admit, when rotates, the entry and displacement of a pivot (2.1) of the profile narrow (2), associated with the drawer

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bars (7), which connect the stops (4, 5) of locking mounts opposites, mounted consecutively;

in which only the mounts of corresponding lock the same drawer can allow opening of the drawer, for the release of the pivots (2.1), remaining the remaining retained,

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  a spring for the recovery of both said stops (4, 5)

characterized in that: each of these lock mounts understands:

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 a small housing (3), comprising two lateral guides vertical (3.1), connected by two horizontal bars irregular (3.2), whose outer profile adapts to the shape of the internal side of the wide profile (1) for coupling;

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 the two stops (4, 5) are contained within the small housing (3), tightly fitted against the back of the little one accommodation (3) and guided vertically by the two lateral guides (3.1);

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 he pivot (2.1) is fixed on the inner face of the narrow profile (2) of the drawer guide,

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 he spring is mounted internally on a rear recess (4.3) of the upper stop (4), which rests on its rear face in a hole (3.5) of the upper irregular bar (3.2) of the small housing (3), which pushes the upper stop (4) down, and by pushing also the bottom stop for the recovery of both.

2. Device for the selective blocking of drawers with protection against the dump, according to claim 1, characterized in that the upper stop (4) and the lower stop (5) are provided, at the rear, with pivots (3.3) or projection means resting against the walls of the cuts of the wide profile (1). 3. Device for the selective blocking of drawers with protection against the dump, according to claim 2, characterized in that the lower stop (5) has an arc-shaped recess (5.1) that allows the rear wing extension housing internal (6.1) of the turntable (6) when it rotates in the counterclockwise direction, and the upper projection (5.3), in which the C-shaped turntable (6) is located, includes, also, a rounding of its upper right edge, so that the locking pivot (2.1) enters better, where, likewise, it incorporates, in its lower part, connection means (5.2) with the bar (7) that connects with the device lower. Device for the selective blocking of drawers with protection against the dump, according to claim 3, characterized in that the upper stop (4) has a frontal projection (4.2) that allows its elevation both at the entrance and at the exit of the pivot (2.1) of the narrow profile (2) of the drawer, which has its arcuate lower face to facilitate sliding, and incorporates, in its upper part, connection means (4.1) with the bar (7) that connects with the upper device , and includes, on its rear face, a recess (4.3), mainly vertical and centered, to accommodate the position recovery spring. 5. Device for the selective blocking of drawers with protection against the dump, according to claim 4, characterized in that the pivot (2.1) has a length such that it can only come into contact with the front projections of the stops (4, 5 ), that is, with the arc-shaped projection (4.2) of the upper stop (4), with the upper projection (5.3) of the lower stop (5), and with the rotating plate (6), located in this projection ( 5.3). 6. Device for the selective blocking of drawers with protection against the dump, according to claim 5, characterized in that, with the exit of the drawer, the pivot (2.1) lifts the upper stop (4) by its projection (4.2) and , during the exit, the turntable (6) rotates in the clockwise direction until its wing (6.1), extended backwards, is placed in an upright position to secure the upper stop (4), which has been gotten up; the stops (4, 5) are in their maximum separation from each other, except for the necessary movement, such that, both the elevation of the lower stop (5) and the descent of the upper stop (4), are prevented . 7. Device for the selective blocking of drawers with protection against the dump, according to claim 5, characterized in that the pivot inlet (2.1) forces the rotation of the turntable (6) counterclockwise , by pressing on its wing (5.1) extended backwards, so that this wing (6.1) stops resting on the upper stop (4) and, therefore, its descent occurs due to lack of support, or it allows the elevation of the lower stop (5). Device for the selective blocking of drawers with protection against the dump, according to claim 6, characterized in that the elevation of the stop (4) by the entrance of the drawer raises all the lower (5) and upper (4) stops that face each locking assembly located above the drawer that is open, so that its pivots (2.1) align with the corresponding turntable (6), such that this stop (5) prevents its exit. 9. Device for the selective blocking of drawers with protection against the dump, according to claim 7, characterized in that, when the stop (4) cannot be lifted because an upper drawer is open, and its stop is at the maximum separation, the projection (4.2) prevents the exit of the pivot (2.1) and, therefore, the extraction of the drawer, and for the same reason, its lower stop (5) cannot be lifted either, so that the blocking is established of all the drawers located below. 10. Device for the selective blocking of drawers with protection against the dump, according to claim 9, characterized in that, by means of a key, the lifting of the upper stop (4) of the uppermost locking assembly is prevented, so that prevents the extraction of all drawers.